Collapsible easel



FIG. 1 is a rear perspective view of a collapsible easel showing my design in collapsed condition;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a bottom view of the collapsible easel; and

FIG. 4 is a front perspective view of the collapsible easel showing the same in fully extended condition for use. 

The ornamental design for a collapsible easel, substantially as shown and described. 